271 lines
7.4 KiB
C
271 lines
7.4 KiB
C
/**************************************************************************/
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/*!
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@file hal_nrf5x.c
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@author hathach
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@section LICENSE
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Software License Agreement (BSD License)
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Copyright (c) 2018, hathach (tinyusb.org)
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the copyright holders nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**************************************************************************/
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#ifdef NRF52840_XXAA
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#include <stdbool.h>
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#include "nrf.h"
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#include "nrf_gpio.h"
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#include "nrf_clock.h"
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#include "nrf_usbd.h"
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#include "nrf_drv_usbd_errata.h"
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#ifdef SOFTDEVICE_PRESENT
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#include "nrf_sdm.h"
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#include "nrf_soc.h"
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#else
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#include "nrf_drv_power.h"
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#endif
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#include "tusb_hal.h"
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/*------------------------------------------------------------------*/
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/* MACRO TYPEDEF CONSTANT ENUM
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*------------------------------------------------------------------*/
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// TODO must cover SD present but not enabled
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#ifdef SOFTDEVICE_PRESENT
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#define POWER_DETECT NRF_EVT_POWER_USB_DETECTED
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#define POWER_READY NRF_EVT_POWER_USB_POWER_READY
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#define POWER_REMOVE NRF_EVT_POWER_USB_REMOVED
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#else
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#define POWER_DETECT NRF_DRV_POWER_USB_EVT_DETECTED
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#define POWER_READY NRF_DRV_POWER_USB_EVT_READY
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#define POWER_REMOVE NRF_DRV_POWER_USB_EVT_REMOVED
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#endif
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/*------------------------------------------------------------------*/
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/* FUNCTION DECLARATION
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*------------------------------------------------------------------*/
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void power_usb_event_handler(uint32_t event);
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// check if SD is present and enabled
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static bool is_sd_enabled(void)
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{
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uint8_t sd_en = false;
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#ifdef SOFTDEVICE_PRESENT
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(void) sd_softdevice_is_enabled(&sd_en);
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#endif
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return sd_en;
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}
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bool tusb_hal_init(void)
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{
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#ifdef SOFTDEVICE_PRESENT
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if ( is_sd_enabled() )
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{
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sd_power_usbdetected_enable(true);
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sd_power_usbpwrrdy_enable(true);
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sd_power_usbremoved_enable(true);
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// USB power may already be ready at this time -> no event generated
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// We need to execute the hanlder based on the status
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uint32_t usb_reg;
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sd_power_usbregstatus_get(&usb_reg);
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if (usb_reg & POWER_USBREGSTATUS_VBUSDETECT_Msk )
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{
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power_usb_event_handler(POWER_DETECT);
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}
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if (usb_reg & POWER_USBREGSTATUS_OUTPUTRDY_Msk )
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{
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power_usb_event_handler(POWER_READY);
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}
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// power_usb_event_handler must be called by SOC event hanlder
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return true;
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}
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#endif
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#if 0
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// USB Power detection
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const nrf_drv_power_usbevt_config_t config =
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{
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.handler = power_usb_event_handler
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};
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return ( NRF_SUCCESS == nrf_drv_power_usbevt_init(&config) );
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#else
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return true; // TODO remove
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#endif
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}
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void tusb_hal_int_enable(uint8_t rhport)
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{
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(void) rhport;
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NVIC_EnableIRQ(USBD_IRQn);
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}
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void tusb_hal_int_disable(uint8_t rhport)
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{
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(void) rhport;
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NVIC_DisableIRQ(USBD_IRQn);
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}
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/*------------------------------------------------------------------*/
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/* HFCLK helper
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*------------------------------------------------------------------*/
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static bool hfclk_running(void)
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{
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#ifdef SOFTDEVICE_PRESENT
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if ( is_sd_enabled() )
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{
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uint32_t is_running;
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(void) sd_clock_hfclk_is_running(&is_running);
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return (is_running ? true : false);
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}
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#endif
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return nrf_clock_hf_is_running(NRF_CLOCK_HFCLK_HIGH_ACCURACY);
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}
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static void hfclk_enable(void)
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{
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// already running, nothing to do
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if ( hfclk_running() ) return;
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#ifdef SOFTDEVICE_PRESENT
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if ( is_sd_enabled() )
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{
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(void)sd_clock_hfclk_request();
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return;
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}
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#endif
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nrf_clock_event_clear(NRF_CLOCK_EVENT_HFCLKSTARTED);
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nrf_clock_task_trigger(NRF_CLOCK_TASK_HFCLKSTART);
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}
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static void hfclk_disable(void)
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{
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#ifdef SOFTDEVICE_PRESENT
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if ( is_sd_enabled() )
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{
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(void)sd_clock_hfclk_release();
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return;
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}
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#endif
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nrf_clock_task_trigger(NRF_CLOCK_TASK_HFCLKSTOP);
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}
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/*------------------------------------------------------------------*/
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/* Controller Start up Sequence (USBD 51.4 specs)
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*------------------------------------------------------------------*/
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void power_usb_event_handler(uint32_t event)
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{
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switch ( event )
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{
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case POWER_DETECT:
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if ( !NRF_USBD->ENABLE )
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{
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/* Prepare for READY event receiving */
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nrf_usbd_eventcause_clear(NRF_USBD_EVENTCAUSE_READY_MASK);
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/* Enable the peripheral */
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nrf_usbd_enable();
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// Enable HFCLK
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hfclk_enable();
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}
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break;
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case POWER_READY:
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/* Waiting for USBD peripheral enabled */
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while ( !(NRF_USBD_EVENTCAUSE_READY_MASK & NRF_USBD->EVENTCAUSE) ) { }
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nrf_usbd_eventcause_clear(NRF_USBD_EVENTCAUSE_READY_MASK);
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nrf_usbd_event_clear(NRF_USBD_EVENT_USBEVENT);
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if ( nrf_drv_usbd_errata_166() )
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{
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*((volatile uint32_t *) (NRF_USBD_BASE + 0x800)) = 0x7E3;
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*((volatile uint32_t *) (NRF_USBD_BASE + 0x804)) = 0x40;
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__ISB(); __DSB();
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}
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nrf_usbd_isosplit_set(NRF_USBD_ISOSPLIT_Half);
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// Enable interrupt. SOF is used as CDC auto flush
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NRF_USBD->INTENSET = USBD_INTEN_USBRESET_Msk | USBD_INTEN_USBEVENT_Msk | USBD_INTEN_ACCESSFAULT_Msk |
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USBD_INTEN_EP0SETUP_Msk | USBD_INTEN_EP0DATADONE_Msk | USBD_INTEN_ENDEPIN0_Msk | USBD_INTEN_ENDEPOUT0_Msk |
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USBD_INTEN_EPDATA_Msk | USBD_INTEN_SOF_Msk;
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// if (enable_sof || nrf_drv_usbd_errata_104())
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// {
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// ints_to_enable |= NRF_USBD_INT_SOF_MASK;
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// }
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// Enable interrupt, Priorities 0,1,4,5 (nRF52) are reserved for SoftDevice
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NVIC_SetPriority(USBD_IRQn, 7);
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NVIC_ClearPendingIRQ(USBD_IRQn);
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NVIC_EnableIRQ(USBD_IRQn);
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// Wait for HFCLK
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while ( !hfclk_running() ) {}
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// Enable pull up
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nrf_usbd_pullup_enable();
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break;
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case POWER_REMOVE:
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if ( NRF_USBD->ENABLE )
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{
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// Abort all transfers
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// Disable pull up
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nrf_usbd_pullup_disable();
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// Disable Interrupt
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NVIC_DisableIRQ(USBD_IRQn);
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// disable all interrupt
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NRF_USBD->INTENCLR = NRF_USBD->INTEN;
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nrf_usbd_disable();
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hfclk_disable();
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}
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break;
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default: break;
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}
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}
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#endif
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